Scaling tool



Sept. 10, 1929. F. DU P. THOMSON SCALING TOOL Filed March 15, 1927 7 Indenion Francisfla oflhomsorg Patented Sept. 10, 1929. 1,727,915

UITED STATES PATENT- OFFICE.

FRANCIS DU SPONT THOMSON, 01E ELKJON, MARYLAND.

SCALING TOOL.

Application filed March 15, 1927. Serial No. 175,625.

My invention relates to scaling tools. The pulses of the spindle shall be communicated object is to provide improved means for sedirectly to the head without lost motion, and curing the head or poll to the spindle. so that there shall be no knocking or pound- The scaling tool to which this invention ing between the spindleeend and its seat and relates is similar in operation to the pneuno marring or injury to the shoulder of said 55 matic riveting hammer, except that in place enlarged spindle-end, and so that the arof the riveting head, a head is provided with bitrary separation of the head from the a square face having cross-corrugations or a spindle and the operative engagement of the series of points verysimilar to the stone dressspindle-end with the head can always be er hammer. secured with case and dispatch. 60

In accordance with the present practice this Referring to the drawings, which illustrate head is removably secured to the reciprocatmerely by way of example a suitable embodiing spindle by means of two pins projecting ment of the invention v i through the body or neck of the head and Fig. l'is an elevation of the spindle-end adapted to engage the annular shoulder and the head in cooperative relationship. 6

formed by an enlarged convex end of the re [Fig. 2 is a vertical section of same, the spinciprorating spindle. This enlarged convex dle remaining in elevation. end of the spindle [its in a corresponding con- Fig. 3 is a similar view with the axis of the cave recess in the head, and the pins permit spindle inclined to the head.

a certain play between the end of the spindle Fig. 4 is an under plan View of the head. and the head so that the plane of the work- Similar numerals refer to similar parts ing face of the head may variously incline to throughoutthe several views. the axis of the spindle as the said face oper- The spindle-end 7 is of usual form, proatcs against the ships hull. When the sharp vided with an enlarged convex end 8, adapted 25 edges or points of the working face of the to seatin a concave recesslo in the central head become worn or deformed, the head is part of the head 11. This recess 10 communi detached. from the spindle for replacement cates with a flaring opening 12 at the rear side or repair. The objection to the securing pins ofthe headto permit of the angular movewhich are so positioned as to permit said anment of the spindle as indicated in Fig. 3. 3O gular play between spindle and head, is that Thisis all substantially in accordance with they also permit lost motion between the end the present practice, which has existed for of the spindle and spindle seat in the head, manyyears. which results in a pounding between the spin- The present invention consists in the means die-end and the head, and also between the for securing the operative relationship bespindle and the securing pins, so that these tween the spindle 7 and head 11. v contacting parts become marred and distort- Between the edgeor margin of the flaring ed, making it difficult, in the first place to opening 12 and the concave recess or seat 10, remove the pins and in the second place to I provide an annular channel 13. This chanfit the spindle-end into a new head. nel surrounds the marginof the recess 10. 40 The present invention avoids the diiiiculty Into this channel is inserted a ring or washer .90 by providing a shoulder or abutment in the lt of rubber or other suitable resilient or head surrounding the seat for the spindle-end yielding material. This ring has an inner and interposing, between said abutment and margin 15 at its lower side,:closely fitting the the shoulder or abutment formed by the enspindle 7 which it surrounds. From the marlarged spindleend, a resilient or yielding gin 15 the inner walls of the ring incline outbody which shall permit free angular movewardly. forming the flaring opening 16blendment of the spindle axis with respect to the ing' with the outer flaring opening 12. head, while maintaining constant working The working face of the head is cross-cercontact between the convex spindle-end and rugated forming a series of cutting points 17. 50 the concave seat therefor, so that the im- When the parts are inplace, the ring 14 embraces the spindle 7 just above the spindle shoulder 18 of the enlarged convex end 8, and effectually prevents accidental disengagement between the spindle and head. It also maintains th'e convex head in I constant engagement with the cooperating face of the concave seat 10, so as to prevent pounding or knocking between adjacent surfaces, atthe same time itpermits free rocking movement of the spindle-end in the concave seat 10, as shown in Fig. 3. The tapered or wedgeshaped edge of the ring at its point of engagement with the shoulder 18, as at 19, is sufficiently yielding to permit this movement.

What I claim is I 1. A scaling tool, comprising a scaling head and a reciprocating spindle associated therewith, the spindle-end being enlarged and having a rigid convex engaging face and an adjacent concave formation, the head having a corresponding rigid concave seat for said convex engaging face, and resilient means, carried by the head and engaging the spindle adjacent the spindle-end, for maintaining constant working engagement between the spindle-end and seat while permitting angular movement of the head with respect to the spindle axis, during the working operation.

2. A scaling tool, comprising a scaling head having a cross-corrugated work-in face and a reciprocating spindle associated t erewith, the spindle-end having a rigid convex engaging face, the head having a corresponding rigid concave seat therefor, and resilient means, carried by the headand engaging the spindle adjacent the spindle-end, for maintaining constant working engagement between the spindle-end and seat while permitting angular movement of the headwith respect to the spindle axis, during the working operation. a

3. A scaling tool, comprising a scaling head having across-corrugated working face and a reciprocating spindle associated therewith, the spindle-end having a rigid convex engaging face, the head having a corresponding rigid concave seat therefor, and resilient means, carried by the head and engaging the spindle adjacent the spindle-end, for normally maintaining the spindle axis at right angles to the plane of said working face and for maintaining constant working engagementbetween the spindle-end and seat while permitting angular movement of the head with respectto the spindle axis, during the working operation.

A. A scaling tool, comprising a reciprocating spindle and a recessed head disengageably associated therewith, the spindle-end having a rigid convex engaging face, the head having a corresponding rigid concave seat, the spindle-end seated in the recess of the head and having a rocking movement therein, and resilient means, carried by the head and engaging the spindle adjacent the spindle-end, for normally supporting the spindle substantially at right angles with the working face of the head and also for maintaining constant working engagement between the spindle-end and said seat while permitting angular movement of the head, with respect to the spindle axis, during operation of the tool.

5. A scaling tool, comprising a reciprocating spindle and a recessed head disengageably associated therewith, the spindle-end having a rigid convex engaging face, the head having a corresponding rigid concave seat, the spindle-end seated in the recess of the head and having a rocking movement therein, and resilient means, mounted within the head and engaging the spindle adjacent the spin-dle-end, for normally supporting the spindle substantially at 'ight angles with the working face of the head and also for maintaining constant working engage ment between the spindle-end and said seat while permitting angular movement head, with respect to the spindle axis, during operation of the tool.

FRANCIS on PONT THOMSON.

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